<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    // let num =20
    // let uname ='张三'
    // console.log('输入输出结果：'+num ,uname)

    let name =prompt('请输入您的姓名：')
    // if (nume ===null || name ===""){
    // document.write("您输入的姓名。")}
    // else{
    // document.write("您输入的姓名是："+name)}
    let age =prompt('请输入您的年龄：')
    let gender =prompt("请输入您的性别")
    document.write(name,age,gender)

    let arr =[张三,李四,王五]
    
  </script>
</body>
</html>